Root CA replace

Hi All,

I did not find, anything about how to replace the Root CA (We would like to generate, hence we decided to replace the old root CA and create a new one with 2 SUB CA.)

So i am looking after some technical documentation, or guide how to proceed with this?

I would be appreciated if you could send me some useful link or anything like that. Especially what kind of certificate should be replaced at Exchange, DC, File Server, Terminal Server etc.